Just a few hotels so far, but echeck-in is coming to Hilton family.
http://www.hiltonhhonors.com/process...px?lp=echeckin
Hilton Chicago O'Hare Airport
Hilton Memphis
The Palmer House® Hilton
Doubletree Hotel Crystal City @ National Airport
Doubletree Guest Suites Santa Monica
Embassy Suites Hotel Memphis
Embassy Suites Hotel Nashville - South/Cool Springs
Hampton Inn & Suites Memphis-Peabody Place
Hampton Inn Tuscaloosa-University
Hilton Garden Inn LAX/El Segundo
Hilton Garden Inn Minneapolis/Maple Grove
Homewood Suites by Hilton Memphis-Germantown
Homewood Suites by Hilton Memphis-Poplar
Sorry if this was posted already.